PT5407N【PDF 7/15 页】REG SW 5/3.3VIN 1.0V 6A HORZ

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Application Notes

PT5400 Series

Capacitor Recommendations for the PT5400

SWIFT ? Series of Power Modules

Input Capacitors

The recommended input capacitance is determined by

100 μF minimum capacitance, 300 mA (rms) minimum

ripple current rating, and less than 300 m ? equivalent

series resistance (ESR). The ripple current rating, ESR,

and operating temperature are the major considerations

when selecting the input capacitor.

It is recommended that tantalum capacitors have a mini-

mum voltage rating of at least twice the working voltage,

including the ac ripple. This is necessary to insure reli-

ability with 3.3-V input voltage bus applications.

Output Capacitors (optional)

The ESR of the output bulk (non-ceramic) capacitance

must be between 10 m ? ≤ ESR ≤ 200 m ? . Electrolytic

capacitors have poor ripple performance at frequen-

cies greater than 400 kHz but excellent low frequency

transient response. Above the ripple frequency, ceramic

decoupling capacitors are recommended to improve the

transient response and reduce any high frequency noise

Table 2-1; Recommended Input/Output Capacitors

components apparent during higher current excursions. A

maximum of 100 μF ceramic capacitance may be added to

the output bus.

Tantalum/ Ceramic Capacitors

Tantalum capacitors are acceptable on the output bus.

Tantalum, Os-con?, or ceramic capacitor types are rec-

ommended for applications where ambient temperatures

fall below 0 °C. Ceramic capacitors may be used instead

of electrolytic types on both the input and output bus.

The input bus must have at least the minimum amount of

capacitance. For the output bus the total amount of

ceramic capacitance should be limited to 100 μF.

Capacitor Tables

Table 2-1 identifies vendors with acceptable ESR and

maximum allowable ripple current (rms) ratings. Capaci-

tors recommended for the output are identified under

the Output Bus column with the required quantity.

This is not an extensive capacitor list. Capacitors from other

vendors are available with comparable specifications. Those

listed are for guidance. The RMS ripple current rating and

ESR (at 100 kHz) are critical parameters necessary to insure

both optimum regulator performance and long capacitor life.

C a p a c i t o r V e n d o r /

C o m p o n e n t

C a p a c i t o r C h a r a c t e r i s t i c s

Q u a n t i t y

S e r i e s

P a n a s o n i c W A ( S M T )

P a n a s o n i c F C

F K ( S M T )

U n i t e d C h e m i – C o n

F S

P X A ( S M T )

M V Z ( S M T )

P S

N i c h i c o n ( F 5 5 ) S M T -

W G ( S M T )

P M

S a n y o O s - c o n ?

S V P ( S M T )

S P

T P A

A V X T a n t a l u m T P S

K e m e t T 5 2 0

T 4 9 5

S p r a g u e 5 9 4 D / 5 9 5 D

T D K - C e r a m i c X 5 R

M u r a t a C e r a m i c X 5 R

1 2 1 0 C a s e

W o r k i n g

V o l t a g e

1 0 V

1 6 V

1 6 V

1 0 V

1 0 V

1 6 V

1 0 V

1 0 V

3 5 V

2 5 V

1 0 V

1 6 V

1 0 V

1 0 V

1 0 V

1 0 V

1 0 V

1 0 V

1 0 V

6 . 3 V

6 . 3 V

V a l u e ( μ F )

1 2 0 μ F

2 2 0 μ F

3 3 0 μ F

1 0 0 μ F

1 2 0 μ F

2 2 0 μ F

2 7 0 μ F

1 0 0 μ F

1 0 0 μ F

1 5 0 μ F

1 2 0 μ F

1 0 0 μ F

1 0 0 μ F

1 0 0 μ F

2 2 0 μ F

1 0 0 μ F

1 0 0 μ F

1 5 0 μ F

1 2 0 μ F

4 7 μ F

4 7 μ F

( E S R ) E q u i v a l e n t

S e r i e s R e s i s t a n c e

0 . 0 3 5 ?

0 . 1 5 0 ?

0 . 1 6 0 ?

0 . 0 4 0 ?

0 . 0 2 7 ?

0 . 1 7 0 ?

0 . 0 1 4 ?

0 . 0 5 5 ?

0 . 1 5 0 ?

0 . 1 6 0 ?

0 . 0 4 0 ?

0 . 0 2 5 ?

0 . 0 8 0 ?

0 . 1 0 0 ?

0 . 1 0 0 ?

0 . 0 8 0 ?

0 . 1 0 0 ?

0 . 0 9 0 ?

0 . 1 4 0 ?

0 . 0 0 2 ?

0 . 0 0 2 ?

M a x R i p p l e

a t 8 5 ° C

C u r r e n t ( I r m s )

2 8 0 0 m A

5 5 5 m A

6 0 0 m A

2 1 0 0 m A

2 4 3 0 m A

4 5 0 m A

4 4 2 0 m A

2 0 0 0 m A

6 7 0 m A

4 6 0 m A

> 2 5 0 0 m A

> 2 8 0 0 m A

> 1 2 0 0 m A

> 1 0 9 0 m A

> 1 4 1 4 m A

1 2 0 0 m A

> 1 1 0 0 m A

1 1 0 0 m A

> 1 0 0 0 m A

> 1 4 0 0 m A

> 1 0 0 0 m A

P h y s i c a l S i z e

( m m )

8 . 3 × 6 . 9

1 0 × 1 0 . 2

8 × 1 0 . 2

6 . 3 × 9 . 8

8 × 6 . 7

8 × 1 0

8 × 1 1 . 5

7 , 3 x 4 , 3

1 0 × 1 0

1 0 × 1 1 . 5

7 × 8

6 . 3 × 9 . 8

7 . 3 × 4 . 8

7 . 3 L

× 4 . 3 W × 4 . 1 H

7 . 3 L × 5 . 7 W

× 4 . 0 H

7 . 3 L

× 6 . 0 W × 4 . 1 H

3 . 6 L

× 2 . 8 W × 2 . 8 H

I n p u t

B u s

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

2

2

O u t p u t

B u s

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

2 ( m a x )

2 ( m a x )

V e n d o r N u m b e r

E E F W A 1 A 1 2 1 P

E E U F C 1 C 2 2 1

E E V F K 1 C 3 3 1 P

1 0 F S 1 0 0 M

P X A 1 0 V C 1 2 1 M H 8 0 T P

M V Z 2 5 V C 2 2 1 M H 1 0 T P

1 0 P S 2 7 0 M H 1 1

F 5 5 1 A 1 0 1 M N

U W G 1 V 1 0 1 M N R 1 G S

U P M 1 E 1 5 1 M P H

1 0 S V P 1 2 0 M

1 6 S P S 1 0 0 M

1 0 T P A 1 0 0 M

T P S D 1 0 7 M 0 1 0 R 0 1 0 0

T P S V 2 2 7 M 0 1 0 R 0 1 0 0

T 5 2 0 D 1 0 7 M 0 1 0 A S

T 4 9 5 X 1 0 7 M 0 1 0 A S

5 9 4 D 1 5 7 X 0 0 1 0 C 2 T

5 9 5 D 1 2 7 X 0 0 1 0 D 2 T

C 3 2 2 5 X 5 R 0 J 4 7 6 K T / M T

G R M 3 2 E R 6 0 J 4 7 6 M / 6 . 3

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